The Apollo program was designed to land humans on the Moon and bring them safely back to Earth. Six of the missions achieved this goal.

Apollo 7 and 9 were Earth orbiting missions to test the Command and Lunar Modules, and did not return lunar data. Apollo 8 through 10 tested various components while orbiting the Moon, and returned photography of the lunar surface.

Apollo 13 did not land on the Moon due to a malfunction, but also returned photographs. The six missions that landed on the Moon returned a wealth of scientific data and 382 kilograms (842 pounds) of lunar rocks. Experiments included soil mechanics, meteoroids, seismic, heat flow, lunar ranging, magnetic fields, and solar wind.